Caterpillar C9 Engine 15 164-3 Injection Actuation Pressure Voltage High

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Caterpillar C9 Engine

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The Engine Control Module(ECM) detects the following conditions:

The voltage for the injection actuation pressure circuit is greater than 4.8 VDC for more than 0.6 seconds.

Cold mode is not active.

Caterpillar C9 Engine

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The injection actuation pressure sensor measures the pressure of the oil in the high pressure oil manifold. The high pressure oil in the manifold is used to actuate the injectors and the high pressure oil is used to control the fuel injection pressure. Fuel injection pressure is based on inputs from the sensors. The inputs are used by the Engine Control Module (ECM) for calculating the fuel injection pressure. The ECM uses the reading from the injection actuation pressure sensor in order to control the operation of the injection actuation pressure control valve.

Probable Causes:

1)ECM Connection

2) Injection actuation pressure sensor

3) Injection actuation pressure sensor wiring/connection

More repair case for Caterpillar machine,please refer to:Caterpillar Machine Repair

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